Cell-free versus cell-to-cell viral transmission in a spatial structure

10 Jul. 2018, 11:30 am
30m
New Law School---101 (University of Sydney)

New Law School---101

University of Sydney

300
Oral Presentation Minisymposium: Host-parasite coevolution in space Host-parasite coevolution in space

Speaker

Koichi Saeki (Utrecht University)

Description

Viruses have two modes spread in a host body, one is to release infectious particles from infected cells (cell-free) and the other is to infect directly from an infected cell to an adjacent cell (cell-to-cell). Since the mode of spread affects the evolution of life history traits, such as virulence, it is important to reveal which mode is selected. Here we show the evolutionarily stable proportion of cell-free and cell-to-cell infection, and how it depends on the spatial distribution of target cells. Using an epidemic model on a 2D regular lattice, we consider the infection dynamics by pair approximation and check the evolutionarily stable strategy. We also conduct the Monte-Carlo simulation to observe evolutionary dynamics. We show that a higher cell-to-cell infection is selected as target cells become clustered. The selected strategy depends not only on the degree of clustering but also the abundance of target cells per se.

Primary authors

Koichi Saeki (Utrecht University) Prof. Akira Sasaki (SOKENDAI)

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